MR0214869
Russell, David L. and Sibuya, Yasutaka
David L. RUSSELL and Yasutaka SIBUYA
The problem of singular perturbations of linear ordinary differential equations at regular singular points. I
Funkcialaj Ekvacioj. Serio Internacia
9
1966
207--218
http://fe.math.kobe-u.ac.jp/FE/Free/vol09/fe09-27.pdf
http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE01-10-en_KML/fe09-207-218/fe09-207-218.pdf
http://www.ams.org/mathscinet-getitem?mr=MR0214869
fe09-207-218
1966
The Problem of Singular Perturbations of Linear Ordinary Differential Equations at Regular Singular Points, I
RUSSELL, David L.; SIBUYA, Yasutaka
RUSSELL, David L.; SIBUYA, Yasutaka
1
Hukuhara, M.
Sur les propriétés asymptotiques des solutions d'un système d'équations différentielles linéaires contenant un paramètre
Mem. Fac. Eng., Kyushu Imp. Univ.
8
1937
249-280
Data is not found in MathSci.
Cache/Hu/Hukuhara,Sur,Mem*,1937,1938
2
Iwano, M.
Asymptotic solutions of a system of linear ordinary differential equations containing a small parameter, I
Funk. Ekv.
5
1963
71-134
MR0171045
0171045
100
Cache/Iw/Iwano,Asymptotic,Funk*,1963,1964
3
Sibuya, Y.
Sur réduction analytique d'un système d'équations différentielles ordinaires linéaires contenant un paramèter
J. Fac. Sci., Univ. of Tokyo, I
I
7
1958
527-540
MR0096016
83
Cache/Si/Sibuya,Sur,J*,1958,1959
4
Turrittin, H. L.
Asymptotic expansions of solutions of systems of ordinary linear differential equations containing a parameter
Annals of Mathematics Studies 29, Contributions to the theory of nonlinear oscillations, vol. II, Princeton University Press, Princeton
1952
81-116
MR0050754
Cache/Tu/Turrittin,Asymptotic,*,1952,1953
5
Wasow, W.
Asymptotic expansions for ordinary differential equations
Interscience Publishers, New York
1965
MR0203188
100
Cache/Wa/Wasow,Asymptotic,*,1965,1966
ix+362